Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.dg/Wstringop-overflow-2.c @ 158:494b0b89df80 default tip
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author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Mon, 25 May 2020 18:13:55 +0900 |
parents | 84e7813d76e9 |
children |
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/* PR tree-optimization/83508 - c-c++-common/Wrestrict.c fails since r255836 Test to verify that only one of -Wrestrict and -Wstringop-overflow is issued for a problem where either would be appropriate. { dg-do compile } { dg-options "-O2 -Wrestrict -Wstringop-overflow" } */ #define DIFF_MAX __PTRDIFF_MAX__ typedef __PTRDIFF_TYPE__ ptrdiff_t; typedef __SIZE_TYPE__ size_t; void sink (void*); void f (ptrdiff_t i, size_t n) { if (i < DIFF_MAX - 2 || DIFF_MAX - 1 > i) i = DIFF_MAX - 2; if (n < 4 || 5 < n) n = 4; char a[8] = "012"; /* The following could very well be diagnosed by -Wstringop-overflow instead but there's no way to verify that only one of the two warnings is issued and the choice of -Wrestrict simply reflects the fact that -Wrestrict runs before -Wstringop-overflow. */ __builtin_strncpy (a + i, a, n); /* { dg-warning "\\\[-Wrestrict]" } */ sink (a); }